My favorite is MathWorld, formerly Eric's Treasure Trove of Mathematics, until some real arseholes at CRC publishing let their lawyers loose on him. Stephen Wolfram is no saint, but he gets serious awesome points for saving this site.

The coolest one I've come across lately is The Art of Problem Solving. It was started by a couple of Math Olympiad contestents, and focuses on resources for budding math geniuses. They also have books they are trying to sell

But, the really mind blowing part of the site is their gallery of animated geometric proofs. Yes, you've seen the geometric proof of the Pythagorean Theorem, but they also have the Law of Cosines!

There's also some good LaTeX resources (on the main site and the wiki)

Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.-- Antoine de Saint-Exupery

In terms of forum help, I almost always find myself on the maths subsection of http://www.physicsforums.com/ - again it has integrated TeX in to the forum, so really easy to write up problems you may have.

I'm so geeky I got really excited about making this signature in SVG until it occurred to me HTML would obviously be turned off ¬_¬'

thoughtfully wrote:My favorite is MathWorld, formerly Eric's Treasure Trove of Mathematics, until some real arseholes at CRC publishing let their lawyers loose on him. Stephen Wolfram is no saint, but he gets serious awesome points for saving this site.

The coolest one I've come across lately is The Art of Problem Solving. It was started by a couple of Math Olympiad contestents, and focuses on resources for budding math geniuses. They also have books they are trying to sell

But, the really mind blowing part of the site is their gallery of animated geometric proofs. Yes, you've seen the geometric proof of the Pythagorean Theorem, but they also have the Law of Cosines!

There's also some good LaTeX resources (on the main site and the wiki)

Now that this thread has been stickied, let's try to keep discussion on the topic of math-related websites.

Unless stated otherwise, I do not care whether a statement, by itself, constitutes a persuasive political argument. I care whether it's true.---If this post has math that doesn't work for you, use TeX the World for Firefox or Chrome

This isn't really of the same calibre as some of the resources posted here, but I have written up some notes for myself that I figure I might as well share in case they can be useful to someone else. They are all at http://www.mathpedia.info .

The software behind the site itself is the result of me recently learning Ruby on Rails and quickly putting together something to help me organise my LaTeX documents. It turned out to be very useful so I added some more functionality to make it more wiki-esque, with users and revisions and what-not. I'm quite happy with the result and I am still developing it so let me know what you think.

Content wise, as I mentioned, it's mostly just what I've been bothered to write, and in many places that isn't much. I would encourage anyone who feels that they can contribute and material to do so as I would love to see this become useful to more than just me.

where on that forum would information be listed about "discrete math"? you know, the bane of every CS student?i'm trying to find some online tutorials prior to my upcoming class. I need the refresher as I haven't looked at the stuff since undergrad...

I know this thread is about web links and not books... but I didn't think it was worth an entirely new topic. Is there a really good book(s) that covers everything from complicated algebra to the really complex stuff? I don't wanna derail the thread or anything so you can pm me links to awesome books or whatnot.Thanks!

Paul Roman has a set of two books that go through pretty much all of an undergraduate mathematics major. It hits basic group, ring and field theory, statistics, calculus, real and complex analysis. He does the whole thing using physics notation, too(I've used it for the sole purpose of decoding some notations that physicists use.) I don't remember its name exactly, but it's something along the lines of "Mathematics for Physicists and non-Mathematicians." If I remember correctly, it does skip over some of the easy parts. In the analysis section, it skips the construction of the reals and most of differentiation, but went into a lot of depth with integration and equations. I think it was published in the late 70's. Hope that helps.

Can anyone recommend one of those websites mentioned above (or different ones entirely, if need be) to someone who - to put it delicately - is not so gifted in the mathematics department?

I am terrible at math. Really, truly, terrible. I like to think that I'm not an unintelligent person, but when it comes to math it's like my brain sees the numbers and just stops working. I speak four languages, I have a pretty decent vocabulary, I do well in school, I just fall to pieces when presented with even the most basic of math.

I do not want to be this way anymore. So, if anyone can recommend websites with drills, or tutorials, or something that would serve to make me a little less dumb, I would greatly appreciate it. Thanks!

I'd suggest trying out some puzzles. Soduku is the obvious one, but less overtly mathematical puzzles will still help you. I'd try to stay away from "drills" until you are more comfortable with doing math. You shouldn't force yourself through agonizing fits, if it can possibly be avoided. You need to enjoy the process, or have a psychological commitment that overcomes the difficult aspects, and that's just asking a lot from anyone.

You might also want to try other branches of math. You might have a knack for Euclidean Geometry or the study of symmetries and not realize it. You could use something like this as a way to ease youself into math gradually. Even music can have mathematical properties to delight both the aesthetic and the intellect.

Finally, the other xkcders would storm my mad scientist's lair with torches and pitcforks if I didn't suggest a little programming experimentation. I'm not suggesting anything like Project Euler, at least not for starting out. But play around with graphics or bitwise operations. You can pick up a lot of math through programming.

Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.-- Antoine de Saint-Exupery

"Labor is prior to, and independent of, capital. Capital is only the fruit of labor, and could never have existed if labor had not first existed. Labor is the superior of capital, and deserves much the higher consideration." - Abraham Lincoln